Polyurea is an ideal material for lining of secondary containment bunds due to its combination of strength, chemical resistance and elasticity.
The majority of bunds are constructed from concrete or blocks or a combination of the two. The crystalline nature of these materials makes them susceptible to cracking if subsidence or movement occurs. Whilst this cracking may not be detrimental to the structure itself, it will often lead to the inability of the bund to hold liquids in the event of a spill.
Because polyurea materials typically elongate in excess of 300% but up to and in excess of 900%, they can accommodate cracking and movement that may be present in a secondary containment structure without cracking or splitting – thus maintaining fluid tightness. When storing hazardous chemicals this if of critical importance.
There are a vast range of polyurea materials available from a range of manufacturers with differing physical and chemical properties – there is no one polyurea that is suitable for all bund linings. As we have been applying polyurea since 2005 we will use or experience to select the best manufacturer and product for your polyurea bund lining project.